18687729

素因数分解:

$3^1\times {\mathrm{97}}^1\times {\mathrm{149}}^1\times {\mathrm{431}}^1$

素因数の和:680

約数の個数: 16

約数和(自身を含む): 25401600

約数和(自身を除く): 6713871

約数列:

[1, 3, 97, 149, 291, 431, 447, 1293, 14453, 41807, 43359, 64219, 125421, 192657, 6229243, 18687729]

約数ペア:

[(1, 18687729), (3, 6229243), (97, 192657), (149, 125421), (291, 64219), (431, 43359), (447, 41807), (1293, 14453)]